Specifications: Material: bearing steel,GCr15 Surface hard-thickness:0.8u~3mm Hardness:HRC602 Outer diameter:8mm or 0.31inch Length:254mm Package included: 2×Cylinder Liner Linear Rail Shaft Optical Axis(If you need other specs and length,pls contact me freely,thank you)Note:The item may be a little longer, because transportation problem, we can't guarantee 100% is straight, Pls consider carefully before order!
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